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G4Peak 27 July 2004 at 12:00 UTC

Northern Lights on 27 July 2004 (Kp 8.7): Where They Were Visible

Kp reached 8.7. At that level the edge of the auroral oval reaches about 49.2° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 44.7°. Activity stayed at storm level (Kp 5 or more) for 27 hours.

03579 G1 G3 Sun 25 Jul 21:00 UTC · Kp 7.33 Mon 26 Jul 00:00 UTC · Kp 7.33 Mon 26 Jul 03:00 UTC · Kp 3.67 Mon 26 Jul 06:00 UTC · Kp 1.67 Mon 26 Jul 09:00 UTC · Kp 2.00 Mon 26 Jul 12:00 UTC · Kp 1.33 Mon 26 Jul 15:00 UTC · Kp 2.00 Mon 26 Jul 18:00 UTC · Kp 3.67 Mon 26 Jul 21:00 UTC · Kp 7.33 Tue 27 Jul 00:00 UTC · Kp 8.33 Tue 27 Jul 03:00 UTC · Kp 7.67 Tue 27 Jul 06:00 UTC · Kp 7.33 Tue 27 Jul 09:00 UTC · Kp 8.00 Tue 27 Jul 12:00 UTC · Kp 8.67 Tue 27 Jul 15:00 UTC · Kp 8.33 Tue 27 Jul 18:00 UTC · Kp 6.33 Tue 27 Jul 21:00 UTC · Kp 6.00 Wed 28 Jul 00:00 UTC · Kp 3.33 Wed 28 Jul 03:00 UTC · Kp 3.33 Wed 28 Jul 06:00 UTC · Kp 2.33 Wed 28 Jul 09:00 UTC · Kp 2.00 Wed 28 Jul 12:00 UTC · Kp 3.33 Wed 28 Jul 15:00 UTC · Kp 3.67 Wed 28 Jul 18:00 UTC · Kp 3.00 Wed 28 Jul 21:00 UTC · Kp 3.00 Mon 26 JulTue 27 JulWed 28 Jul
Kp 0–3 Kp 4 Kp 5–6 (G1–G2) Kp 7+ (G3+) Times in UTC; faded bars are forecasts.

Three-hourly Kp from GFZ, one day either side of the storm.

Where the aurora could be seen

4,505 towns on our list had enough activity while it was dark there. Cloud cover is not included.

CountryPlacesExamplesFurthest from the pole
United States 1,763 New York City, Brooklyn, Chicago, Queens Virginia Beach
United Kingdom 710 London, Birmingham, Glasgow, Manchester Falmouth
Germany 432 Berlin, Hamburg, Köln, Frankfurt Worms
Canada 402 Toronto, Montreal, Calgary, Ottawa Eastern Passage
Poland 308 Warsaw, Kraków, Wrocław, Łódź Nowy Targ
Netherlands 147 Rotterdam, Amsterdam, The Hague, Utrecht Maastricht
Sweden 133 Stockholm, Gothenburg, Malmö, Uppsala Trelleborg
Belgium 102 Brussels, Antwerp, Ghent, Charleroi Arlon
Denmark 94 Copenhagen, Aarhus, Odense, Aalborg Nykøbing Falster
Finland 78 Helsinki, Espoon keskus, Tampere urban area, Vantaa Raseborg
Ireland 55 Dublin, Cork, Limerick, Galway Cork
Norway 50 Oslo, Bergen, Stavanger, Kristiansand Mandal
Czechia 43 Prague, Ostrava, Pilsen, Liberec Olomouc
Latvia 39 Riga, Daugavpils, Liepāja, Jelgava Daugavpils
Lithuania 31 Vilnius, Kaunas, Klaipeda City Municipality, Šiauliai Druskininkai
New Zealand 30 Christchurch, Wellington, Dunedin, Lower Hutt Whanganui
France 28 Lille, Amiens, Roubaix, Tourcoing Charleville
Australia 24 Melbourne, Adelaide, Geelong, Hobart Tuggeranong
Estonia 21 Tallinn, Tartu, Narva, Pärnu Võru
China 7 Daxing’anling, Jiagedaqi District, Genhe, Oroqen Zizhiqi Jiagedaqi District
Kazakhstan 4 Astana, Kostanay, Petropavl, Kokshetau Astana
Luxembourg 4 Diekirch, Grevenmacher, Wiltz, Mersch Grevenmacher
Based on each place's Kp threshold (terrain included) and the Sun's position during each 3-hour Kp block.

Only in photos

2,031 more towns could have caught a faint red or green glow low on the horizon with a phone or camera.

Whether the aurora was actually seen also depended on the weather. Use this as a guide to where it was possible.

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